The Nike Air Tech Challenge II Hot Lava (2014) is a relaunch of the Air Tech Challenge II sneaker that was inspired by the tennis player, Andre Agassi, who wore this style on the court during the 1990s. The upper of the 2014 Air Tech Challenge II iteration is made from a combination of leather and synthetic materials. The shoe has a white and Hot Lava colorway with black and Flat Silver accents. The outsole has a herringbone pattern for traction and movement changes and is made of rubber. The Nike Air logo is displayed on the heel and on the tongue. Our experts think that one of the unique aspects of the Nike Air Tech Challenge II Hot Lava (2014) is the use of the Air technology in the sole. This technology provides an unparalleled level of comfort and cushioning for the wearer. The shoe was released on January 24th, 2014, at a retail price of $120.